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MenuItem.Popup Event

Occurs before a menu item's list of menu items is displayed.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

public event EventHandler Popup
/** @event */
public void add_Popup (EventHandler value)

/** @event */
public void remove_Popup (EventHandler value)

JScript supports the use of events, but not the declaration of new ones.

This event only occurs when a menu item has submenu items to display. You can use this event handler to add, remove, enable, disable, check, or uncheck menu items based on the state of your application before they are displayed. For more information about handling events, see Consuming Events.

The following code example demonstrates how to use the Popup event to determine whether MenuItem objects that provide support for cut, copy, and delete operations are enabled before the menu they are displayed in is shown. The example determines if textBox1, a TextBox control on the form, is enabled, has input focus, and has text selected before enabling the MenuItem objects. This example requires that three MenuItem objects are created named menuCut, menuCopy, and menuDelete have been created.

private void PopupMyMenu(object sender, System.EventArgs e)
{
   if (textBox1.Enabled == false || textBox1.Focused == false ||
      textBox1.SelectedText.Length == 0)
   {
      menuCut.Enabled = false;
      menuCopy.Enabled = false;
      menuDelete.Enabled = false;
   }
   else
   {
      menuCut.Enabled = true;
      menuCopy.Enabled = true;
      menuDelete.Enabled = true;
   }
}

private void PopupMyMenu(Object sender, System.EventArgs e)
{
    if (textBox1.get_Enabled() == false || textBox1.get_Focused() == false 
        || textBox1.get_SelectedText().get_Length() == 0) {
        menuCut.set_Enabled(false);
        menuCopy.set_Enabled(false);
        menuDelete.set_Enabled(false);
    }
    else {
        menuCut.set_Enabled(true);
        menuCopy.set_Enabled(true);
        menuDelete.set_Enabled(true);
    }
} //PopupMyMenu

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0
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